(geometry) A triangle one of whose angles is obtuse.

(geometry) A triangle having a right angle as one of its interior angles.

(geometry) A triangle having each of its three sides of different lengths.

(geometry) A triangle all of the angles of which are acute.

An area in the Atlantic Ocean where many ships and planes have disappeared under allegedly mysterious circumstances.

(by extension) Any place where things mysteriously disappear.

plural of Cape triangle

(geometry) A triangle having all three sides equal.

(British spelling) A plane triangular graph on which are drawn all the colours that can be made by the additive mixing of red blue and green; these three primary colours are at the apices, while white is in the middle.

(geometry) A triangle having at least two sides equal.